He may be describing have a phone line that is an internet phone line thru cable. So, technically I guess, ‘wireless’ if comparing it to being plugged into a Ma Bell telephone land-line. Our 7525 has a ‘phone line’ going into it that connects to the cable modem.
Ooh... that does sound possible. He might have subscribed to a cable service that also offered a POTS jack, back when his business was better off (he suffered from an illness for a few months and things fell behind).
How does a pore ole hi tech red neck ever compete with a real redneck? Who is positive that automagic runs everything. The hi tech one knows there has to be logical explanations!